Machine for operating on shoe bottoms



Nov. 20, 1923 E. ERICKSON MAQHINE FOR OPERATING ON SHOE BOTTOMS Original Filed June 4, 1917 5 sh et -sheet] wI/III, 2-3

ll /09 V05 I IIIIIIIA 1, /5 ""J'IIIIIIII/ wiineas:

Nov. 20, 1923 E. ERICKSON momma FOR OPERATING on SHOE BOTTOMS Original Filed June 4, 1917 5 Sheets-Sheet 2 all 1,474,34 E. ERICKSON MACHINE FOR OPERATING ON SHOE BOTTOMS Nov. 20 1923.

Original Filed June 4, 1917 5 Sheets-Sheet 5 Wiinaa: %a/14 Nov. -20, 1923v 1,474,348

-, I E. ERlcKsoN MACHINE FOR OPERATING ON SHOE BOTTOMS Original Filed June 4, 1917 5 h t t 4,

Nov. 20, 1923 1,474,348

E. ERICKSON MACHINE FbR OPERATING on sum: BomoMs Original Filed June 1 917 '5 s -sh t 5 pg A m9 w wailwwr v I wwmwyanw I Fatented Nov. 20, 1923.

siren srars 1,4743% r GFFIQE.

EDWARD ERICKSON, OF BEVERLY, IVIAS SACHUSETTS, .ASSIGNOR- 'I'O UNITED SHOE MA GHINERY CORPORATION, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

MACHINE FOR OPERATING 0N SHOE BOTTOMS.

Original application, filed June 4, 1917, Serial No. 172,658. Divided and this application filed December 4, 1919. Serial No. 342,408. Renewed March 28, 7.923.

To (ZZZ whom it may concern:

Be it known that I, EDWARD Emcnsox, a citizen of the United States,;residing at Beverly, in the county of Essex' and State of Massachusetts, have invented certain new and useful Improvements in Machines for Operating on Shoe Bottoms; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. I

This invention relates to machines for operating on shoes in a partial state of com pletion and more particularly to tacker mechanisms for securing certain parts together.

The present application is a division of my Letters Patent of the United States No. 1,373,553, granted April 5, 1921, which discloses a machine that is adapted to position the welt ends for the butting operation, pro duce a bevel or scarf on each welt end and tack the upper to the insole at the point where the welt ends are butted. The claims of said patent are directed to the general organization of a welt butting and tacking machine, while the present application is concerned with tacker mechanisms of the kind disclosed whether or not embodied in a machine having a welt butting mechanism.

The object of the present invention is to improve the construction andmode of operation of tacker mechanisms, providing for their operation at increased speed, with, greater eiiiciency, and with less loss of power.

To the accomplishment of this object and such other objects as may hereinafter appear, as will be apparent to those skilled in the art, the features of the invention relate to certain devices, combinations and arrangement of parts hereinafter described and particu' larly pointed out in the appended claims.

The preferred form of the invention is illustrated in the accompanying drawings, in

which Figure 1 is an elevation of the left hand away, of the inside face of the righthand side frame; Fig. 3 is a detail in perspective of parts shown in Fig. 3; Fig. 1 is a detail.

in a vertical section, of the lower end of the tacker mechanism; Figs. 5, 6 and 7 are details illustrating different positions ofthe welt. butting knives and of the tacker mechanism at diiferent times during the welt butting and tacking operations; Fig. 8 is avertical section of the driving shaft and its actuating mechanism on the line 8-8 of Fig. 1; and

Fig. 9 is an end elevation of the clutch and clutch operating mechanism at the right hand side of the machine.

The invention is illustrated as embodied in the combined welt butting and tacking machine disclosed in said Patent No. 1,378,553, which machine is provided with mechanism for positioning both welt ends for the butting operation mechanism for butting both welt ends simultaneously, and mechanism for thereafter inserting tacks to secure the upper which has been lasted in by the welt positioning operation. In connection with the description of the tacker mechanism con stituting the subjectmatter of the present applicatio-n, therefore, it will be necessary to describe also the illustrated welt positioning and welt butting instrumentalities.

In the embodiment of the invention illustrated in the drawings and referring first to Figs. 1, 2 and 3, the mechanism for posupporting frame of which is secured to a,

bracket 29 bolted to a table 31 cast at the upper side of the goose neck 17 (Fig. 1).

The moving parts are driven by the rotation of a driving shaft 33 (Figs. 1 and 8) which extends transversely of the head and is journaled in bearings 35 and 37 (Fig. 8) at the rear of the machine provided beneath the guard plate 39 (Fig. 1). The driving shaft is normally at rest but may be conne ted at the will of the operator to a power shaft 11 i which iscontinuously driven by a belt runports are shown in dotted lines in Fig. 2,

' journaled in in position beneath the welt ends. It will be understood that, as is usual in this type of machine, the welt supports are forced into the welt crease by the inward movement of the swinging side frames23 and 25 about their pivot rods 19 and 21. The consequent pres sure exerted on the welt crease by the welt supports causes the upper, just in advance of the heel seat tacks,*to be properly lasted In order to position the shoe for the v proper engagement of the welt supports with the welt crease, the machine is provided with a back gage 53 which may be adjusted longitudinally so as to locate the heels of shoes of different sizes properly for the inward movement of the welt supports. is the'back gage adjusting mechanism forms no part of the present invention, it isnothere described, reference being made to said Patent No. 1,373,553 for a detailed description thereof.

The forward ends of the swinging side frames 23 and 25 are normally held apby means of a spring 87 (Fig. 2) the ends which areattached to pins projecting from the rear ends of the side frames. In order that the two frames 23 and 25 may move together, they are provided with intermeshing toothed segments 89 and 91 respectively, through which the lower ends of the rods 19 and 21 extend. Treadle mechanism is pro-- vided to overcome the force of the spring 87 and bring the forward ends of the swinging side frames into position to support a shoe for the operations to be performed thereon. The operating treadle 93 1) is pivoted at 95 in the lower part of the column 15 and is connected by a treadle rod 97 to the horizontal arm 99 of a bell-crank lever pinned to a transverse rock-shaft 101 the lower part of the machine head. The vertical arm 103 of this bell-crank lever is provided with a. socket which receives one end of a. coil spring 100, the other end of which bears in a socket formed inthearm 107 which projects upwardly and has two legs 109, one at each side of the bell crank 99-103, by means of which it is loosely pivoted on the rock-shaft 101. The upper end of thelever 107 is provided with a horizontal head in each end oi which there is formed a socket 110 for the reception of the inner ends of struts 111 which extend between the head and sockets 113 (Fig. 2) for their outer ends, formed at the rear ends of the swinging side frames 23 and 25. The treadle is normally held raised by a spring 115 (Fig. 1) comieeting it to'the coiumn 15 so that normally the spring 105 is not under tension. When the treadle is depressed, however, the lowering of the treadle rod 97 operates through the bell-crank lever 99-1O 3, and the spring 105, to more the vertical arm 10? to the left (Fig. 1) which operates on the inner ends-of the two struts 111 so as to bring the str ts into a position approaching aiinement, and consequently forces the rear ends of the side frames apart, stretching the spring 87, as is shown in Fig. 2. This outward movement of the rear ends of the side frames causes an inward movement of their front ends and brings the welt supports into the welt crease of the shoe which has previously been placed with its heel against the back gage 53 and which is held by the operative at a proper height to receive the welt supports in the welt crease. Means may be provided to limit the opening movement of the side frames to a degree commensurate with the width of the shoe to be operated upon, such as is clearly disclosed. in said Patent No. 1,373,553. 7

It will be observed that on pressing the treadle 93 only so much pressure can be placed upon the welt crease by the supporting plates as is permitted by the strength of the spring 105 (Fig. 1) for, as soon as the pressure equals the strength of the spring,

the spring will begin to compress without further movement of the arm 10? or further straightening of the toggle formed by the struts 111. The strength of the spring 105 may be varied by an adjustment of a threaded block 106 to suit the strength of the material which is being operated upon. Gontinued depression of'the treadle will, however, continue to rock the shaft101 which movement sets in motion the driving mechanism for operating the moving parts of the machine, such parts comprising the weltbutting knives, the tacker mechanisms and tack delivering mechanism contained within the tack pot.

Referring now more particularly to Figs. 1 and 8, the power shaft 41, which extends longitudinally in the machine and is supported in a journal at the rear of the ma,

chine head, carries intermediate its length a spiral gear 125 which drives a second spiral gear 12?, the hub. 129 of which has a bearing upon the driving shaft 33. Connected by a suitable driving joint to the hub 129 is a sleeve 181, which forms the bearing for a Horton clutch. This clutch, as is usual, is

loo

roll carrier 137 with its rolls 139, interposed between the clutch ring and cam ring, and an operating spr ng 1 11 (dotted lines Fig. 9). It is thus see that the spiral-gear hub 129 and clutcl'i-ring hub 131 form a hollow shaft which is continuously driven from the power shaft. interposed between the driving shaft bearing 37 and the spiral gear 127 is a suitable thrust bearing 1 13. Between the two bearings 35 and 37 of the driving shaft 33 and located on the median line oi? the two swinging side arms is a crank 1 15 (Figs. 1 and 8), the rotation of which.

through connections to be described later. operates the welt-buttingknives and tucker mechanisms. At the left hand end of" the sh aft outside the machine frame, there is secured a disk 1&7 which carries a wrist pin 1 19 to whi h is connected, by the yoke shown in Fig. 1, a. pitman 151 which, through its reciprocations. operates the mechanism for delivering tacks to the tack tubes for delivery to the tacker nozzles.

On the right hand end of the rock-shaft 101 is an arm 153 (Figs. 1 and 9) which carries the adjust-able tappet- 155. When the shaft 101 is rocked suiiiciently by pressure on the treadle 93, the tappet 155 engages the forwardly projecting arm 157 of the threearmcd lever pivoted loosely upon a horizontal stud 159 (Figs. 8 and 9) carried by the machine frame, and the movement thus imparted to this lever causes the Horton clutch to become engaged, to rotate the driving shaft 33 through a single revolution, by means new to be described. The rearwardly projecting arm 161 of the three-armed lever has pivoted thereto, by its lower end, an upwardly projecting rod 163 which passes through a yoke formed at the forward end oi a horizontally disposed lever 165 pivoted upon a second stud 167 threaded into themachine frame. The lever 165 carries at the rear side of the stud 167 an arm 169 which supports the usual yielding butter 171 adapted to be engaged by the usual stop shoulder on the Horton clutch at the time the clutch is disconnected. The lever 165 also has secured thereto a tooth 173 which is engaged by a shoulder 175 out in the rear edge of the vertical rod 163. A spring 177 connected at its forward end to the rod 163 and at its rear end to the buiier supporting arm 169 normally holds the butter in position for stopping the clutch and draws the rod 163 rearward into engagement with the tooth 173. A second spring 179 connected at its forward end to the third arm 181 of the three-armed lever hereinbefore referred to, and by its rear end to a pin 183 (Fig. 8) carried by the machine frame normally maintains the tappet engaging arm 157 of the lever in raised position and holdsthe shoulder 175 below the tooth 17 3.

The driving shaft 33 also has secured thereto a brake wheel 185, which, at the time the clutch is disconnected, is engaged by a brake shoe 187 which, as shown in Fig. 9, partially surrounds the brake wheel. The brake shoe is mounted upon an eccentric bearing 189 which, in turn, is carried upon a reduced portion 1.91 of the hub of the lever arm 165 (Fig. .8). The eccentric bearing is formed as a split ring and is secured to the reduced hub 191 by means of a clamping bolt 193 (Fig. 9). 'r-i cap plate 195 holds all of these parts in place on the stud 167. It is readily seen that with this construction whenever the buffer arm 169 is thrown inward to disconnect theHorton clutch the occentric bearing 1.89 is rotated and moves the brake shoe 187 into engagement with the brake wheel 185, and vice versa a movement of the buffer arm to the right, in Fig. 9, to permit the clutch to operate will, by a reverse rotation of the eccentric mounting 189, withdraw the brake shoe from the brake wheel. By loosening the cap plate 195 and the bolt 193 the eccentric bearing may be adjusted. angularly as may be necessary to increase its throw whenever it becomes desirable to do this by reason of wear of the parts of the brake.

The operation of these parts will be understood best from Fig. 9, it being apparent that when the tappet 155 descends the threearmed lever is rotated on its pivot in a direction to raise the r0d163 and consequently, through engagement of the shoulder '17 5 with the tooth 173, rock the lever 165 in a direction to withdraw the buffer 171 from its engagement with the stop of the Horton clutch. Simultaneously with this movement the brake is released and the spring 141 of the Horton clutch moves the roll carrier in a direction to cause the rolls to bind and drive the shaft 33.

It is not desired, however, that it be necessary for the operative to maintain his foot on the treadle while the driving shaft is rotating and the welt-butting and taclrer. mechanisms are being operated. 'Some means must be provided, therefore, for locking the swinging side frames in the position to which they have been moved by the depression of the treadle. Such a locking mechanism is illustrated in Fig. 1 and comprises a vertical arm not shown secured to the rock shaft 101 having pivoted to its upperend the forward end of a rectangular rod 197 the rear end of which extends through a rectangular opening in the arm 199, depending from, and pivoted freely on, a horizontal stud 9,01 carried by the machine frame. The free end oi the arm 199 is normally pulled forwardby a spring 203 connected between the arm and the iiramie.

lVhen the machine is in a position of rest a pin 205 on the disk 147 at the end of the driving shaft is in engagement with an upwardly projecting car 207 carried by the arm 199 and maintains this arm in such position that the rod 197 can slide freely through the rectangular opening in the arm. As soon as the driving shaft begins to rotate, however, the pin 205 is renioved from its engagement with the ear 207 and this permits the spring 203 to rock the arm 199 to an angular position with relation to the rod 19? whereb the corners of the opening in the arm above and below the rod will bind on the rod and act a look to prevent the rock-sl'iaft 101 from rotating un der the influence of the extended treadlo spring 115.

In order to hold the rotation of the driving shaft to asinole revolution, the roll carrier 1.3? of the Horton clutch provided witha radial pin 2-09 (dotted lines Fig. 9) which, on the clockwise rotation of the drivinr shaft 33, enga, es the upper end of the rod 163, pushing this red forward about its pivot and withdrawing the shoulder 175 from-beneath the tooth 173. The spring; 177 iinn'iediately acts to pull the clutch buffer 171 into position to be engaged by the clutch stop, at the same time applying the brake, by reason of the; angular movement'imparted by the movement of the lever 165, to the eccentric brake hearing 189. Before the machine stops, however, the pin 205 on the disk 147 (Fig. 1) engages the car 207 of the lock arm 199 and turns this arm to aposition normal to the rod 197, so as to release the clutch operating tappet 155 to the influence of the spring 105 and also the side frames to the influence of the treadle spring 115. Consequentt I drawn from engagement with the three; armed lever, the spring 17 9 is enabled to return the clutch operating parts to the position shown in Fig. '9, and the spring 87 which. connects the rear ends of the sine frames operates to open the frames about their pivo" eds 19 and 21 and thus release the shoe from engagement by the welt, supporting plates and 1 7. In the mean time. during, the single revolution of the driving shaft, the two welt ends have been butted and two tacks, one at each side of the shoe, have been driven.

The shoe having been positioned by the depression of the treadle, the driving shaft having been connected to the power shaft by the actuation of the driving shaft clutch, andia tack having on the previous operation been delivered to each of the tack tubes 219 (see Fig: l) in the manner fully explained in said Patent No. 1,373,553, the welt is then butted and subsequently tacked by the instrumentalities now to be described.

Referring now to Fig. 1, the crank H5 the rear end of the slide. the tappet 155 is with- 2) whichlies horizontally, with the legs of the H pointing outwardly toward the side frames 23 and 25. The slots and 285 formed between the legs of the H car c-ubi' cal slide blocks 287 and 289 which are drilled vertically for the reception therethrough of vertical pins carried by the weltbutting knife oper ting slides 291 and-29S.

With this construction, a rotation of the crank 1&5 to withdraw the piston 275 within its guideway causes the slides 2-91 and 293 to withdraw and operate the wcltlmtting and tacking mechanism.

As the side frames 23 and 25 which form 1 the guides for the slides 291 and '293 are usually at an angle to the line of movement of the piston 275, the slots 283 and 285 in the head 281 provide for an outward movement of the connecting blocks 28'? and 289 as the slides are withdrawn. Since the mechanism c: r-riedby each of the side frames i similar, it will be suflioient to describe the mechanism at one side only. The mechanism upon the side frame 25 at the right hand side of the niacl'iiue will be used for this purpose.

Referring; more particularly to Fig. 3, which illustrates the various mechanisms on. theside frame 25 in a position of rest, the welt-butting -knife slide 293 is connected the block 289 by a pin 295 which extends between two inwardly projecting cars at The slide rests upon a flat track, or way, 297 formed on the lower portion of the side frame 25. The

slide is T-shaped in cross-section and is guided during its rearward movement" by the side walls of the swinging frame which are recessed to overlap its Teh ad (see broken parts of 1). upper part of the slide 2-98 isv channel shaped for the greater portion of its length and its side walls are cut and drilled at two separate points for the reception of the lowercylindrioal ends of two links 299. The upper ends of these links are received in similar openings formed in channel. shaped welt-butting knife carrier 301 (Fig. 3) but the link llll) Ill-3 openings in the carrier are further'apart than those in the slide, as shown in; Figs. 5 to 7. This mounting of they knife carrier permits it to be rocked back and forth relatively to the knife slide to lower and raise the welt-butting knife relatively to the Shoe. The movement in a. rearward direction is limited by the end of the carrier abutting against a shoulder 303 (Fig.7) formed'on the slide and a movement in forward direction is limited by the engagement of an adjustable stop screw 305 (see Fig. 5) with the surface of the nose 307 of the slide. The welt-bntting knife 309 which extends inward laterally from the carrier (see Fig. 2) is clamped to the end of the carrier in a dove-tail slot by means of a block 311 (Fig. 3) having a pin extending forwardly through a downwardly projecting portion of the end of the carrier and secured in place by a nut. Just in front of the knife is a welt presser 313 Fig. 2).

The movement of the welt-butting knife slides 291 and 293 actuates also the tacker mechanism. Referring to Fig. 3 for a disclosure of the tackcr mechanisn'i, the forward edge of each swinging side frame is grooved vertically to form a rectangular way 343 which is closed by a face plate 315 (see also Fig. 1). Within this way isseated, for vertical sliding movement, the driver slide 347. This slide 3 17 is bored longitudinally for the greater part of its length for reception of the cylindrical driver bar 349. At it lower end the slide 347 is provided with a reduced bore through which the tack driver 351 extends (Fig. 4). The tack driver is secured to the lower end of the driver bar by a nipple 353 in the usual manner. Also the lower end of the driver slide has secured thereto, by a second nipple 355, a suitable tack nozzle 357. At its upper end the driver bar is provided with a shoulder in the form of a head 359 (Fig. 3) the rear end of which is bifurcated and embraces the two sides of a vertical track 361 formed on the side frame. A roll is carried by the head which engages the track 361 and guides the bar in its movement through the driver slide. The extreme upper end of the driver bar carries a conical cap 363 which is engaged by a socket on one end of the coiled driving spring 365. The other end of the driving spring is connected to a block 367 having a pin secured in a bearing 369 (see Fig. 1) at the rear side of the driver slide. Pivoted by its lower end, at 371, in a vertical slot formed for its reception at the upper end of the face plate 345 is alatch lever 373 (dotted lines Fig. 3) carrying at its upper end a roll 37 5 which is normally held in the path of movement of the driver bar head 359 by means of a spring pressed pin 377. The inward movement of the lever 37 3 is limited by a lug on the lever engaging astop pin 381 mounted in the face plate. The driver head 359 is provided with beveled surface 383 so located that on the upward movement of the driver bar the roll 375 is cammed to one side until the head has reached a position above the roll when the roll snaps back beneath the head and supports the driver bar against down ward movement. The latch lever 373 is also provided witha' cam piece 385. which projects into the path of andis adaptedtobe engaged by a cam piece 387, formed at the upper end of the driver bar slide, when said slide descends. The purpose of this action will presently be described. The driver bar slide is provided at it rear side with teeth 389 and forms, in effect, a rack which is engaged by the teeth of a segment 391 carried by ashaft 393 journaled in the side frame. The segment is provided with a downwardly projecting part which forms a crank arm and is connected at its lower eX- tremity by a link 395 to an army 397 extendin upwardly from and integral with, the we t-butting knife carrier 301 (see Fig. 3).

All the moving parts just described are held within the swinging side frame 25 by a cover plate (not shown) suitably bolted on, and a similar cover plate 2-1 is provided for the side frame 23 (see Fig. 1).

Referring now particularly to Figs.v 5, 6 and 7, and remembering that the moving parts, just prior to the welt butting opera tion, are in the relative positions shown in Fig. 3, when the driving shaft 33 commences to rotate the piston 275 and its H-shaped head 281 are drawn backwardly, or away from the operative which causes the welt-butting knife slides 2 1 and 293 to be drawn rearwardly. Describing now the operation of one of the knives only, as the slide 293is withdrawn on its track 297, the resistance ofiiered by the tacker mechanism causes the links 299 to pivot about their lower ends and tilt the welt-butting knife carrier 301 forward until its stop screw 305 engages the nose 307, as shown in Fig. 5. This brings the welt presser into engagement with the welt and places the knife in the plane of the surface of the guard, 339, this position being deterll'llllBCl by a proper adjustment of the screw 305. Further rearward movement of the piston 275 now draws both the slide and the carrier reaiwvardly together causing the knife to cut through and bevel the welt end. As the weltbutting knife carrier 301 moves rearwardly it drawswith it the link 39.5 and, by turning the segment 391, draws the driver-bar slide 3 17 downwardly relatively to the driver-bar. The tack which has been restingin a tack-way 348 formed for its reception in the inner side of the driver-bar slide just above the nozzle 357, as shown in F ig. 4:, drops into the nozzle when the driver-bar slide has been drawn down sufiiciently for the trackway to come below the lower end of the driver. The tack is now in position to be driven whenever the driver is permitted to descend. The downward movement of the driverbar slide acts to continually place tension upon the driver spring 365, since thedriver-bar itself is held from downward movement by reason of its head 359 being above the roll 375 on the latch lever 873.- Just as he n e s-=3 leeches theishoe, as shown in Fig. 6, the cam -387 on the driver-bar slide engages the cam the driver bar.

385 on the latch lever and pushes the latch lever to the right in Fig. 3, so as to Withdraw the'roll 375 from beneath the head 2559 or the driver-bar to the action of the new fully tensioned. driving -spr1ng365 and the tack is driven intothe shoe, the parts at this time again moved forward, first relatively to the iii) driver-bar slide 3557.

carrier 301 which causesthe links299 to tilt backward until therea-r end oi. the carrier engages the shoulder 303 (see Fig. 7) thus -ra1s1ng the welt-butting knife from the shoe. The forward motion of the carrier 301 actuates the link 393 to reversely rotate the segment 391 and again rais the Sincc the head of line driver-bar rests at this time upon the upper end of'the driver-bar.slide. the driver and its driving spring are both raised together until the latch lever it tilted out- Wardly by engagement of the cam surface 383 with the roll 275 and the head eventually rests upon the roll 37 A friction plug 399 is seated in'the face plate 3&5 and spring pressed. as shown in Fig. 3, against the forward side oi. the driver-bar slide 3 1 -This plug otters sufficient resistance to prevent movement of the segment 391 during the first part of the movement of the crank 14.5 to lower the cutter 309, and provides means for insuring that 'tlie cutter carrier 301 is'inovcd toward and from the Welt rest about its pivotal connection with the cutter slide 293. T he plug performs a like function to restrain the rier from moving relatively to the slile at :the start of the return. movement, thnsraising the knife from the welt before the carrier is advanced by the slide to its forward position ready for another cutting strokev Each driver-bar slide is also provided \vitha longitudinal groove 350 in its inner face, best shown in Fig. l, which forms an upward extension of the tackivay 3&8, the

function of which is to receive any extra :tacks which may have accidentally been discharged, which-may lie partially in the tack tube and .tackway,.and thus prevent jamming" when thetaekerfslidc is inoved down- Wardly.

The pivot 3710i the latch lever 3 3 is integral with "the lever and turns in a-hor madeiorits reception at the side of the face plate 345. A recess 3.46 (Fig. 3) within the faceplate is of suclrdiinensions that "when the lever is' turned in a horizontal position the" pivot may he l out ofthehore and the l vthe face. plate.

" Thea.-;sim1:ilicity. ease .zc't. the operation This immediately releases otthe machine'willbe at once--a1; p.arentto anisins is derived from a single crank motion.

The tacker operating inechaniszn'is such that when the machine is at rest, with thedrivers held Withdrawn from the shoe, the driving spring is not under tension, thus making it easy to dismantle this mechanism Whenever desired. The side frames are so constructed as to provide for carrying tl'iedrivers at an inclination to the shoe bottom as is, sual, whereby the tacks are uniformly clinched on the iron heel plate of the last. Throughout. the mechanism is sim :)le,'easily assembled and sturdy.

Nothing l'ierein contained is to be construed as limiting this invention in the scope of its application to use in connection with the particular machine or theparticular mode of operation, or both,. -selec.ted "for purposes oi illustration and explanation. 'lVlnle the particulars ot construction herein set forth. are well suitedto-one form of the inventiomit is notto heunderstood that these particulars are essential, since they may he variously modified Within the skill of the artisan Without departing from the truescopeot' the actual invention as de-- the driver-bar. and a driving spring con-.

nected to the bar and-the slide; and means or moving the slide relatively to the bar to tension. the spring. I

2. A. machine for operating on shoehot toms hai ing, in combination. a tack driver slide. adrivcr-bar movable relatively to the slide and having a driver; adriver spring: ronnecting the bar and slide; means for moving said parts away from the shoe to gether; and means for moving. the driver 3.1a machine for operating on shoe hottoms ring; a tack driver-barhaving a head-to ge means to hold said her Wit .dratvn frointhe shoe; :1 to which theother end, of'the s aring attached, said-slide carrying a tack nozzle at its lowjer cnd, the arrangement being such. that when the nozzle and slide are Withdrawn from shoe the-springns having. in combination, driving a socket on one endot said spring;

d: and to advance the-slide 4. A machine for operating on shoe bot toms having, in combination, tacker mechanism including a driver-bar having a driver, a driver slide having a tack nozzle movable relatively to the driver-bar, and a driving spring connected to the bar and the slide; a latch to hold the bar withdrawn. from the shoe; means to move the slide relatively to the bar to tension the spring; and means to trip the latch after a time whereby the tensioned spring advances the bar to drive the tack in the nozzle.

5. A machine for operating on shoe bottoms having, in combination, tacker mechanism including a driver-bar having a driver, a driver slide movable relatively ito the driver-bar, and a driving spring connected to the bar and the slide; a latch to hold the bar withdrawn from the shoe; means to move the slide relatively to the bar to'tension the spring; and means carried by the slide to trip the latch and permit the tensioned spring to advance the driver.

6. A machine for operating on shoe bottoms having, in combination, a tacker frame; a driver slide movable on said frame toward and from the shoe; a driver-bar slidable relatively to the slide and having a shoulder; ayielding latch member supported on the frame adapted to engage said shoulder and hold the bar withdrawn from the shoe; a driving spring bearing on said bar; means to move the slide relatively to the bar; and means controlled by the movement of the slide to cause the latch member to yield and release the bar to the action of the spring.

7. A machine for operating on shoe bot toms having, in combination, a tacker frame; a driver slide movable toward and from the shoe on said frame; a driver-bar slidable relatively to the slide and having a shoulder; a laterally yielding latch member supported on the frame adapted to engage said shoulder and hold the bar with drawn from the shoe; a driving spring connected at one end to the bar and at its other end to the slide; means to move the slide relatively to the bar to tension the spring; a cam on the latch member; and a cam on the slide adapted to engage the latch cam after the spring has been. tensioned to disengage the latch from the bar.

8. A machine for operatin on shoe bottoms having, in combination, a tack driver and a tack nozzle relatively movable; and a. driving spring for said driver arranged so as to be tensioned by a movement of the nozzle away from the driver.

9. A machine for operating on shoe bottoms having, in combination, a tanker frame; a track driver; and a latch member seated in a slot in the frame in position to support said driver, said latch comprising a lever pivotally mounted on an integral which the bar operates, said slide being movable in the frame relatively to the bar; a tackway in the slide adjacent the driver; means to deliver tacks tosaid tackway; and means to prevent the slide from jamming if tacks are improperly delivered to the tackway.

11. A machine for operating on shoe bottoms having, in combination, a driver; a slide having a tackway so located as to hold a tack adjacent the driver and a slot extending upwardly from the receiving end of the tackway; aframe supporting the slide and driver having a tack delivery opening for delivering a tack to the tackway; and means for moving the slide downwardly relatively to the driver and said delivery opening to an extent suflicient to allow the tack to drop into the tackway below the driver, said slot being of sulficient length to maintain the delivery opening continually covered by the slot.

12. A machine for operating on shoe bottoms having, in combination, a movable tack driver-bar; a tack driver slide movable relatively to the driver-bar; and a drivingspring having two ends. one of which is rigidly secured to the driver slide and the other of which engages the end of the driverbar, the construction of the spring and the location of the points of connection being such that when the driver slide and bar are moved together the spring is relaxed, but when the slide is moved relatively to the bar the spring is tensioned.

13. A machine for operating on shoe bottoms having, in combination, a tack driver having a shoulder; a pivotally mounted plate on which said shoulder rests when the driver is withdrawn from the Work; and

a tacker frame having a way for said driver 7 and a' slot for receiving said plate, said slot having a portion wider than the plate where the plate is pivoted in the frame but otherwise being approximately the width of the plate.

1 1. A machine for operating on shoe bottoms having, in combination, a frame: a driver-bar having a'driver; a slide within which the bar operates, said slide being movable in the frame relatively to the bar; a tackway in the slide adjacent the driver and a longitudinal slot in the slide above and forming a continuation of said tackway; a tack tube for delivering tacks terminatin adjaoentthe juncture of said tackconnected to each of said elements,

way and slot; and means to reciprocate said slide relatively to the driver bar.

15. A. machine for operating on shoe bot toms having, in combination, a tack driver slide and a tack driver bar telescopically arranged; a driving spring so connected to said elements and so proportioned that when the telescoping elements are extended the spring is placed under tension; and means for moving one of said elements relatively to the other to etlect such tensioning of the spring.

16. A machine for operating on shoe bottoms having, in combination, a tack driver slide and a tack driver bar telescopically arranged; a driving spring having an end said points of connection being close together when one element is housed within the other and the spring being untensioned; and means for moving one of said elements relatively to the other to separate said points of connection and place the spring under tension.

17. A machine for operating on shoe bottoms having, in combination, a tack driver bar having a head, a tack driver slide surrounding said bar and having a head, said heads being in engagement when the bar is housed within the slide, means for moving the slide relatively to the bar, a latch member for engaging the driver bar head to hold the bar from movement While the slide is moving, means on the slide head for trip ping said latch member after a predetermined movement of the slide, and a spring acting on the driver bar to advance it within the slide when the latch member is tripped.

18. A machine for operating on shoe bottoms having, in combination, tacker mechanism including a driver bar having a driver and a driver slide having a tack nozzle, said bar being arranged with its driver in the nozzle; means to deliver a tack to position against the driver above the nozzle; means to move the nozzle oil the driver to permit said tack to enter the nozzle and to advance the nozzle toward the shoe bottom; a spring for operating the driver bar; and means to cause said spring to actuate the driver bar and drive said tack from the nozzle when the advance of the nozzle has brought the tack into driving position with relation to the shoe bottom.

19. A machine for operating on shoe bottoms having, in combination, tacker mechanism including a driver bar having a driver and a driver slide having a tack nozzle, said bar heingarranged with its driver in the nozzle; means to deliver a tack to aposition against the driver above the nozzle; means tomove the nozzle oh the driver to permit said tack to enter the nozzle and for holding said driver bar from movement while thenozzle approa hes tack driving position; a spring tor operating the driver invents a tack nozzle within which the driver op crates; means to advance the nozzle away from the driver to tack drivmg position; a

spring to actuate the driver to drive a tack in the nozzle, said spring being restrained from operatlon While the nozzle is advancing; and means movable with the nozzle for releasing said spring to cause the tack to be driven.

21. A machine organized to insert tacks into a shoe bottom having, in combination, means for holding a shoe in a fixed position, a tack nozzle movable toward and from the shoe, a driver arranged to drive tacks from the'nozzle into the shoe, a spring for operating the driver, echanism to move the nozzle toward and from the shoe and acting in one of said movements to place'the driver spring under tension, and meanscontrolled by movement of the nozzle toward the shoe for releasing the driver.

22. A machine organized to insert tacks into a shoe bottom having, in combination, means for holding a shoe in a fixed position, a tack nozzle movable toward and "from the shoe, a driver arranged to drive tacks from the nozzle into the shoe, a spring for operating the driver, mechanism to move the nozzle toward and from the shoe and acting in one of said movements. to place the driver spring under tension, and means acting dint ing movement of the nozzle toward the shoe for releasing the driver.

23. -r machine organized toinsert tacks into a shoe bottom having, in combination, means for holding a shoe in fixed position, a tack nozzle l'novahle toward and from the shoe, a driver arranged to drive tacks tronr the. nozzle into the shoe, a spring for open ating the driver, mechanism to move the nozzle toward and from the shoe and acting in one of said movements to place the driver spring under tension, and means, controlled by operation of said mechanism in moving the nozzle toward the shoe, for releasing the driver.

2a. A. machine for operating on shoe bottoms havin in combination, a tack nozzle. a driver arranged to drive a tack from said nozzle into the shoe bottom, a spring to operate the driver, a latch for restraining the driver from action when the spring is under tension, mechanism -:tor moving the nozzle toward and from the shoe bottom and causing the spring to be placed under tension during one of its movements, and means operated by movement of said mechanism to release the latch when the nozzle has been moved into proper relation'to the shoe hotton'i for the tack to be driven-J 25. A machine for operating on shoe bottoms having, in combination, a tack nozzle, a driver arranged to drive a tack from the nozzle, a spring to operate the driver, mechanism to move the nozzle toward and from the shoe, and connections for placing the driver spring under tension by one of said movements of the nozzle and for restraining the spring from acting during movement of the nozzle toward the work until the nozzle is in position for the tack to be driven, said mechanism then acting through said connections to release the spring to cause the tack to be driven.

26. A machine for operating on shoe botnozzle, power means to move said slide and tack nozzle from an upper positionto receive tacks to a lower position for tack insertion, means for delivering a tack to the nozzle while the nozzle is in its upper position remote from the work, a spring for actuating the driver, connections for causing the spring to be placed under tension by movement of the slide, and means controlled by the means for moving the slide to release the driver to the action of the spring.

EDWARD ERIoKsoN. 

